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Organic light emitting diodes using magnesium doped organic acceptor as electron injection layer and silver as cathode

Chinese Physics B, ISSN: 1674-1056, Vol: 17, Issue: 5, Page: 1911-1915
2008
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Organic light emitting diodes employing magnesium doped electron acceptor 3, 4, 9, 10 perylenetetracarboxylic dianhydride (Mg:PTCDA) as electron injection layer and silver as cathode were demonstrated. As compared to Mg:Ag cathode, the combination of the Mg:PTCDA layer and silver provided enhanced electron injection into tris (8-quinolinolato) aluminium. The device with 1:2 Mg:PTCDA and Ag showed an increase of about 12% in the maximum current efficiency, mainly due to the improved hole-electron balance, and an increase of about 28% in the maximum power efficiency, as compared to the control device using Mg:Ag cathode. The properties of Mg:PTCDA composites were studied as well. © 2008 Chin. Phys. Soc. and IOP Publishing Ltd.

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